At a rally in Monsey, a Rockland County town northwest of New York City, hundreds of ultra-Orthodox Jews on Monday heard from speakers who shared warnings and conspiracy theories, including that Jewish communities are being intentionally given “bad” doses of the measles, mumps and rubella vaccine.

“Is it possible that these lots are bad?” Dr. Lawrence Palevsky, who runs a holistic pediatric wellness center in Long Island, New York, asked the crowd, ﻿according to The New York Times. “It’s fascinating because we’re told how contagious the disease is, but somehow it’s centered in the Jewish community.”

JOHANNES EISELE via Getty Images
A youth crosses a street in Monsey, New York, where a measles outbreak has sickened scores of people, mainly from the Orthodox Jewish community.

Orthodox Rabbi Hillel Handler of Brooklyn also pushed the belief that Jews are being targeted. He accused government officials of trying to blame Jews for spreading measles, and claimed it actually comes from undocumented immigrants.

“We Hasidim have been chosen as the target in order to distract from the virulent diseases that are sweeping through the city from illegals,” he told the crowd, according to Gothamist.

Handler reportedly also claimed, unsubstantially, that contracting the measles or chickenpox is a good thing as it decreases one’s chance of getting cancer, heart disease and strokes.

She was right it filled up. There were people who’d ridden buses from Brooklyn and other areas to attend. pic.twitter.com/d93bHeG7sm

The Centers for Disease Control and Prevention ― which has warned that there are roughly two to three deaths among every 1,000 measles cases ― has credited the unusually high number of measles cases across the U.S. to travelers who contract the disease overseas and then bring it to communities that have under-vaccinated populations.

Recent measles outbreaks in New York State, New York City and New Jersey have been linked to overseas travel, primarily among unvaccinated people in Orthodox Jewish communities who brought it back from Israel, the CDC has said.

Some parents who oppose vaccines have dismissed the CDC, accusing the federal health agency of lying.

Local health and government officials, along with a local rabbi, issued a joint statement in which they condemned the claims shared at Monday’s gathering. They said those views “runs counter to every statement from the medical experts and elected officials of our county.”

This type of propaganda endangers the health and safety of children within our community and around the world, and must be denounced in the strongest language possible.joint statement from New York health and government officials

“This type of propaganda endangers the health and safety of children within our community and around the world, and must be denounced in the strongest language possible,” the statement read. “The MMR (measles, mumps, rubella) vaccine is safe and effective and is the only way to prevent the measles.”

Del Bigtree, a former television producer on CBS’s talk show “The Doctors,” also appeared before the crowd, proclaiming: “Every study shows around the world that the unvaccinated children are healthier.”